ffmpegUSB 웹 카메라로 촬영 한 이미지를 Ubuntu 11.10에 저장 하고 싶습니다 . lsusb출력 :
Bus 002 Device 003: ID 0c45:6028 Microdia Typhoon Easycam USB 330K (older)
카메라는 치즈를 사용하여 잘 작동하지만 명령 줄 도구를 사용하여 스크립트 가능하게 만들려고하지만 시도하면
ffmpeg -i /dev/v4l/by-id/usb-0c45_USB_camera-video-index0 image.jpg
출력은 다음과 같습니다.
user@box:~$ sudo ffmpeg -i /dev/v4l/by-id/usb-0c45_USB_camera-video-index0 image.jpg
[sudo] password for user:
ffmpeg version 0.7.3-4:0.7.3-0ubuntu0.11.10.1, Copyright (c) 2000-2011 the Libav developers
built on Jan 4 2012 16:21:50 with gcc 4.6.1
configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
WARNING: library configuration mismatch
avutil configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
avcodec configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
avformat configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
avdevice configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
avfilter configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
swscale configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
postproc configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=i386 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavutil 51. 7. 0 / 51. 7. 0
libavcodec 53. 6. 0 / 53. 6. 0
libavformat 53. 3. 0 / 53. 3. 0
libavdevice 53. 0. 0 / 53. 0. 0
libavfilter 2. 4. 0 / 2. 4. 0
libswscale 2. 0. 0 / 2. 0. 0
libpostproc 52. 0. 0 / 52. 0. 0
/dev/v4l/by-id/usb-0c45_USB_camera-video-index0: Invalid data found when processing input
이 작업을 어떻게합니까?
답변
선택해라:
ffmpeg
ffmpeg -f video4linux2 -i /dev/v4l/by-id/usb-0c45_USB_camera-video-index0 -vframes 1 test.jpeg
두 프레임을 사용하고 두 번째 프레임을 사용하는 것이 좋습니다.
ffmpeg -f video4linux2 -i /dev/v4l/by-id/usb-0c45_USB_camera-video-index0 -vframes 2 test%3d.jpeg
fswebcam
이것은 매우 좋은 프로그램이며 지연 옵션이 있습니다.
fswebcam -r 640x480 --jpeg 85 -D 1 shot.jpg
mplayer
mplayer tv:// -tv driver=v4l2:device=/dev/video0:width=1600:height=1200:outfmt=rgb24 -frames 3 -vo jpeg
PS USB 웹캠이 응답을 멈추거나 “녹색”사진을 찍는 경우 플러그를 뽑았다가 다시 연결하십시오. ffmpeg를 사용하여 “드라이버가 프레임 당 시간을 32767/1에서 2/5로 변경했습니다”에서 멈춤
답변
실제로 이것은 나와 함께 작동하지만 세 번째 사진 만 녹색이 아닙니다.
mplayer tv:// -tv driver=v4l2:device=/dev/video0:width=1600:height=1200:outfmt=rgb24 -frames 3 -vo jpeg
첫 번째와 두 번째는 초록색입니다. 약간의 시행 착오로 설정했습니다.
mplayer tv:// -tv driver=v4l2:device=/dev/video0:width=640:height=480:outfmt=rgb24 -frames 5 -vo png
결과는 1 번째와 2 번째 파일은 녹색이지만 3-5 번째는 rgb이며 올바르게 가져옵니다.